Optical imaging lens

Abstract

An optical imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element arranged in order from an object side to an image side along an optical axis. Each lens element has an object-side surface and an image-side surface. The first lens element has positive refracting power, and the image-side surface of the first lens element has a concave portion in a vicinity of a periphery. The third lens element has negative refracting power, and the image-side surface of the third lens element has a concave portion in a vicinity of a periphery. At least one of the object-side surface and the image-side surface of the fourth lens element is aspheric surface, and at least one of the object-side surface and the image-side surface of the fifth lens element is aspheric surface. The sixth lens element has positive refracting power, and the image-side surface of the seventh lens element has a concave portion in a vicinity of the optical axis.

What is claimed is: 
     
       1. An optical imaging lens, comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element arranged in sequence from an object side to an image side along an optical axis, each of the first lens element to the seventh lens element comprising an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through, wherein
 the first lens element has positive refracting power, and the image-side surface of the first lens element has a concave portion in a vicinity of a periphery of the first lens element; 
 the third lens element has negative refracting power, and the image-side surface of the third lens element has a concave portion in a vicinity of a periphery of the third lens element; 
 at least one of the object-side surface and the image-side surface of the fourth lens element is an aspheric surface; 
 at least one of the object-side surface and the image-side surface of the fifth lens element is an aspheric surface; 
 the sixth lens element has positive refracting power; and 
 the image-side surface of the seventh lens element has a concave portion in a vicinity of the optical axis; 
 wherein the optical imaging lens satisfies:
   ( T 6+ G 67+ T 7)/( T 1+ T 4)≤1.65, and
 
     V 3≤35.00,
 
 
 T 1  is a thickness of the first lens element along the optical axis, T 4  is a thickness of the fourth lens element along the optical axis, T 6  is a thickness of the sixth lens element along the optical axis, T 7  is a thickness of the seventh lens element along the optical axis, G 67  an air gap from the sixth lens element to the seventh lens element along the optical axis, and V 3  is an Abbe number of the third lens element; and 
 lens elements having refracting power of the optical imaging lens are only the first lens element to the seventh lens element. 
 
     
     
       2. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
     V 2≤35.00,
 
 
       V 2  is an Abbe number of the second lens element. 
     
     
       3. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
     TTL /( G 34+ BFL )≤5.00,
 
 TTL is a distance from the object-side surface of the first lens element to the image plane along the optical axis I, G 34  is an air gap from the third lens element to the fourth lens element along the optical axis, and BFL is a distance from the image-side surface of the seventh lens element to an image plane of the optical imaging lens along the optical axis. 
 
     
     
       4. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
     TL /( T 4+ G 34)≤7.50,
 
 TL is a distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element along the optical axis I, and G 34  is an air gap from the third lens element to the fourth lens element along the optical axis. 
 
     
     
       5. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
     AAG /( G 34+ G 45)≤2.71,
 
 AAG is a sum of six air gaps from the first lens element to the seventh lens element along the optical axis, G 34  is an air gap from the third lens element to the fourth lens element along the optical axis, and G 45  is an air gap from the fourth lens element to the fifth lens element along the optical axis. 
 
     
     
       6. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
     ALT /( T 1+ G 34)≤4.54,
 
 ALT is a sum of thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, and the seventh lens element along the optical axis, and G 34  is an air gap from the third lens element to the fourth lens element along the optical axis. 
 
     
     
       7. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
   EFL/( T 1 +T 4 +G 34)≤3.71,
 
 EFL is an effective focal length of the optical imaging lens, and G 34  is an air gap from the third lens element to the fourth lens element along the optical axis. 
 
     
     
       8. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
   ( T 2+ G 23+ T 3)/ G 34≤4.40,
 
 T 2  is a thickness of the second lens element along the optical axis, T 3  is a thickness of the third lens element along the optical axis, G 23  is an air gap from the second lens element to the third lens element along the optical axis I, and G 34  is an air gap from the third lens element to the fourth lens element along the optical axis. 
 
     
     
       9. The optical imaging lens according to  claim 1 , wherein the optical imaging lens satisfies:
   ( T 5+ T 6+ G 67)/ T 1≤2.70,
 
 T 5  is a thickness of the fifth lens element along the optical axis. 
 
     
     
       10. An optical imaging lens, comprising a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, and a seventh lens element arranged in sequence from an object side to an image side along an optical axis, each of the first lens element to the seventh lens element comprising an object-side surface facing the object side and allowing imaging rays to pass through and an image-side surface facing the image side and allowing the imaging rays to pass through, wherein
 the first lens element has positive refracting power, and the image-side surface of the first lens element has a concave portion in a vicinity of the optical axis; 
 the object-side surface of the second lens element has a convex portion in a vicinity of a periphery of the second lens element; 
 the third lens element has negative refracting power, and the image-side surface of the third lens element has a concave portion in a vicinity of a periphery of the third lens element; 
 at least one of the object-side surface and the image-side surface of the fourth lens element is an aspheric surface; 
 at least one of the object-side surface and the image-side surface of the fifth lens element is an aspheric surface; 
 the sixth lens element has positive refracting power; and 
 the image-side surface of the seventh lens element has a concave portion in a vicinity of the optical axis; 
 wherein the optical imaging lens satisfies:
   ( T 6+ G 67+ T 7)/( T 1+ T 4)≤1.65, and
 
     V 3≤35.00,
 
 
 T 1  is a thickness of the first lens element along the optical axis, T 4  is a thickness of the fourth lens element along the optical axis, T 6  is a thickness of the sixth lens element along the optical axis, T 7  is a thickness of the seventh lens element along the optical axis, G 67  an air gap from the sixth lens element to the seventh lens element along the optical axis, and V 3  is an Abbe number of the third lens element; and 
 lens elements having refracting power of the optical imaging lens are only the first lens element to the seventh lens element. 
 
     
     
       11. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
     TTL /( G 56+ BFL )≤4.80,
 
 TTL is a distance from the object-side surface of the first lens element to the image plane along the optical axis I, G 56  is an air gap from the fifth lens element to the sixth lens element along the optical axis, and BFL is a distance from the image-side surface of the seventh lens element to an image plane of the optical imaging lens along the optical axis. 
 
     
     
       12. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
     TL /( T 4+ G 56)≤8.00,
 
 TL is a distance from the object-side surface of the first lens element to the image-side surface of the seventh lens element along the optical axis I, and G 56  is an air gap from the fifth lens element to the sixth lens element along the optical axis. 
 
     
     
       13. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
     AAG /( G 45+ G 56)≤2.30,
 
 AAG is a sum of six air gaps from the first lens element to the seventh lens element along the optical axis, G 45  is an air gap from the fourth lens element to the fifth lens element along the optical axis, and G 56  is an air gap from the fifth lens element to the sixth lens element along the optical axis. 
 
     
     
       14. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
     ALT /( T 1+ G 56)≤4.26,
 
 ALT is a sum of thicknesses of the first lens element, the second lens element, the third lens element, the fourth lens element, the fifth lens element, the sixth lens element, and the seventh lens element along the optical axis, and G 56  is an air gap from the fifth lens element to the sixth lens element along the optical axis. 
 
     
     
       15. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
   EFL/( T 1+ T 4+ G 56)≤3.51,
 
 EFL is an effective focal length of the optical imaging lens, and G 56  is an air gap from the fifth lens element to the sixth lens element along the optical axis. 
 
     
     
       16. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
   ( T 2+ G 23+ T 3)/ G 56≤3.20,
 
 T 2  is a thickness of the second lens element along the optical axis, T 3  is a thickness of the third lens element along the optical axis, G 23  is an air gap from the second lens element to the third lens element along the optical axis I, and G 56  is an air gap from the fifth lens element to the sixth lens element along the optical axis. 
 
     
     
       17. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
   ( T 5+ T 6+ G 67)/ T 4≤3.17,
 
 T 5  is a thickness of the fifth lens element along the optical axis. 
 
     
     
       18. The optical imaging lens according to  claim 10 , wherein the optical imaging lens satisfies:
   ( T 6+ G 67+ T 7)/( G 34+ G 56)≤4.00,
 
 G 34  is an air gap from the third lens element to the fourth lens element along the optical axis I, and G 56  is an air gap from the fifth lens element to the sixth lens element along the optical axis.